[Plugin: NextGEN Gallery] How To Change NextGen Gallery Widget CSS

First of all, thanks for this great plug-in. It is truly wonderful.

I need a little help altering the CSS for the NextGEN Slideshow Widget SlideShow. I’d like to frame it with a 1px black border, white background and center it within the sidebar.

From other forum entries, I gather that I need to change the
/* ———– Sidebar widget ————-*/ section, specifically .ngg-widget, .ngg-widget-slideshow. When I try to add
text-align:center;
border:1px solid #000;
it doesn’t change. I’m confident that changing the nggallery.css file is working as I am seeing changes in other areas taking affect.

Any help would be appreciated. The site URL is http://www.middlebushreformedchurch.com.

Thanks in advance!